Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Control / Air Fuel Ratio (A/F) Sensor

Purpose/Function

Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas as basic information for mainly determining the fuel injection amount.
Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas and inputs it to the PCM as an oxygen concentration (all-range air/fuel ratio) signal.

Construction

Installed to the exhaust manifold.
A zirconium element has been adopted as the detecting element for detecting the oxygen concentration (all-range air/fuel ratio).

Operation

Inputs the signal, which fluctuates according to the oxygen concentration (all-range air/fuel ratio), to the PCM.

A/F sensor characteristic

Fail-safe


DTC No.	Fail-safe function
P0031:00	Stops the fuel feedback control.
P0032:00	Stops the fuel feedback control.
P0130:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0131:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0132:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0134:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P064D:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2237:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2243:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2251:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.

Air Fuel Ratio (A/F) Sensor Removal/Installation

WARNING: A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system. CAUTION: Do not allow fla ...

Camshaft Position (CMP) Sensor Inspection

Intake CMP Sensor Visual inspection CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, ...

Other materials:

Cruise Control System
Outline Enables driving at a constant speed by setting the vehicle speed with the cruise control switch instead of operating the accelerator pedal. The PCM controls the throttle valve actuator to maintain the vehicle at a constant speed. Component and function ...

Air Intake Actuator Inspection [Manual Air Conditioner]
1. Connect battery positive voltage to air intake actuator terminal B (or C), connect terminal C (or B) to ground, and then verify that the air intake actuator operates as shown in the table. If the operation condition is not normal, replace the air intake actuator. ...

Climate Control Unit Removal/Installation [Manual Air Conditioner]
Removal 1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Shift lever knob (MTX). b. Glove compartment. c. Front console box. d. Shift panel. e. Upper panel. f. Rear console. g. Side wall. h. Decoration panel. i. Front console. 3. Press the tab down, ...